We want to take about :
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Transcript of We want to take about :
>>Introduction about project
>> Block diagram .
>> Microcontroller.
>> Video Codec .
>> Audio Codec . >> Wireless Audio and Video Transmission and – RF -
TFT LCD Module & >> CMOS Camera
>> What had been done? .
>> What will be done. ?
Perform simple control functions
such as turning on and off the devices
when the push buttons are
Pressed
PIC18F4520
-HIGHER FREQUENCY BANDS CAN BE PARTITIONED INTO LARGE NUMBER OF CHANNELS AS THEY HAVE BROADER BANDWIDTHS. A BANDWIDTH OF AT LEAST 4-6 MHZ MUST BE ASSIGNED TO OBTAIN A REASONABLY CLEAR PICTURE
ISM 2.4 GHZ FREQUENCY BAND
-MOST WIDESPREAD SYSTEMS IN THE LICENSED-FREE 2.4 GHZ
XBEE-PRO ZNET 2.5-RF MODULES ONLY
COMMUNICATE WHEN THEIR IDS ARE MATCHED.
-THE XBEE-PRO ZNET 2.5 IS ABLE TO PERFORM AUTOMATIC ROUTE DISCOVERIES
-THEY CAN TRANSMIT UP TO 120M FOR INDOORS AND 1 MILE FOR OUTDOORS.
VIDEO CODECENCODER
-HIGH SPEED
-DIGITAL TO ANALOG VIDEO ENCODER
-HAS 8-BIT VIDEO PORT TO ACCEPT YCBCR422 VIDEO OUTPUT
VIDEO CODECDECODER
-CONSUME LESS POWER
-GIVES EXCELLENT QUALITY
-INCLUDE NOISE FILTER
-FIX INCORRECT
-FRAMES(LESS BER)
-IT HAS INTERRUPT PIN
AUDIO CODEC
THE AUDIO CODEC USED IN THE PROJECT IS AD74111 FROM ANALOG DEVICES .
THIS AUDIO CODEC IS PARTICULARLY SUITABLE FOR SPEECH AND TELEPHONY APPLICATIONS WHERE MONO INPUT AND OUTPUT
CHANNELS ARE REQUIRED .
CMOS Camera &TFT LCD
The camera used in the project is V100.
It is a 2-megapixel color camera module with digital output and uses the CMOS image sensor OV2640 from OmniVision.
CMOS Camera &TFT LCD
The TFT LCD module is used in the Receiver unit to display the video images of the caller .
What will be done next?
We'll build the next circuits &program the controller in caller unit and receiver